Question

find the value of k if x+4 is factor of x2 +3x+ k​

Answer 1

Answer:

x + 4 = 0

x = - 4

Put value of x in x² + 3x + k

x² + 3x + k = 0

(-4)² + 3(-4) + k = 0

16 - 12 + k = 0

4 + k = 0

k = 0 - 4

k = - 4

Hence, k = 4.